87819733 has 2 divisors, whose sum is σ = 87819734. Its totient is φ = 87819732.

The previous prime is 87819713. The next prime is 87819737. The reversal of 87819733 is 33791878.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84217329 + 3602404 = 9177^2 + 1898^2 .

It is a cyclic number.

It is not a de Polignac number, because 87819733 - 2¹⁷ = 87688661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87819737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43909866 + 43909867.

It is an arithmetic number, because the mean of its divisors is an integer number (43909867).

Almost surely, 2^87819733 is an apocalyptic number.

It is an amenable number.

87819733 is a deficient number, since it is larger than the sum of its proper divisors (1).

87819733 is an equidigital number, since it uses as much as digits as its factorization.

87819733 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 46.

The square root of 87819733 is about 9371.2183306121. The cubic root of 87819733 is about 444.4920906258.

The spelling of 87819733 in words is "eighty-seven million, eight hundred nineteen thousand, seven hundred thirty-three".